Hi Mike,
Yes. In CXL SPEC chapter 8.1.9, the number of register blocks need calculate
from DVSEC length value of DVSEC header1 register.
-----Original Message-----
From: Kinney, Michael D <michael.d.kin...@intel.com>
Sent: Friday, August 18, 2023 11:30 PM
To: Chris Li OS <chri...@os.amperecomputing.com>; devel@edk2.groups.io; Nong,
Foster <foster.n...@intel.com>; Gao, Liming <gaolim...@byosoft.com.cn>
Cc: Yao, Jiewen <jiewen....@intel.com>; Ni, Ray <ray...@intel.com>; Open Source
Submission <patc...@amperecomputing.com>; Kinney, Michael D
<michael.d.kin...@intel.com>
Subject: RE: [edk2-devel] [PATCH v3 1/1] MdePkg: Add Cxl20.h into
IndustryStandard
Is RegisterBlock a flexible array member?
If so, then [] is the compatible syntax.
Mike
> -----Original Message-----
> From: Chris Li OS <chri...@os.amperecomputing.com>
> Sent: Friday, August 18, 2023 2:29 AM
> To: devel@edk2.groups.io; Nong, Foster <foster.n...@intel.com>; Gao,
> Liming <gaolim...@byosoft.com.cn>
> Cc: Yao, Jiewen <jiewen....@intel.com>; Ni, Ray <ray...@intel.com>;
> Kinney, Michael D <michael.d.kin...@intel.com>; Open Source Submission
> <patc...@amperecomputing.com>
> Subject: [edk2-devel] [PATCH v3 1/1] MdePkg: Add Cxl20.h into
> IndustryStandard
>
> Absorbed Foster's input with minor delta.
> @Nong, Foster @Liming and all kindly help review/vote again.
>
> One change compared with Intel's proposal is the below line, we prefer
> [1] style to be safer to work across all compilers.
> Let us know if you folks have different suggestions here.
>
>
> - CXL_DVSEC_REGISTER_LOCATOR_REGISTER_BLOCK
> RegisterBlock[0]; // offset 0x0C
> + CXL_DVSEC_REGISTER_LOCATOR_REGISTER_BLOCK
> RegisterBlock[1]; // offset 0x0C
>
>
> Thanks all!
>
> -----
> 1) Add CXL 2.0 header file to comply with CXL 2.0 specification
> 2) CXL 2.0 header will embed Cxl11.h
> 3) Updated Cxl.h to point to 2.0 header file
>
> Signed-off-by: Chris Li <chri...@os.amperecomputing.com>
> ---
> MdePkg/Include/IndustryStandard/Cxl.h | 2 +-
> MdePkg/Include/IndustryStandard/Cxl20.h | 465
> ++++++++++++++++++++++++
> 2 files changed, 466 insertions(+), 1 deletion(-) create mode 100644
> MdePkg/Include/IndustryStandard/Cxl20.h
>
> diff --git a/MdePkg/Include/IndustryStandard/Cxl.h
> b/MdePkg/Include/IndustryStandard/Cxl.h
> index 06c1230e3e..9ad3242e25 100644
> --- a/MdePkg/Include/IndustryStandard/Cxl.h
> +++ b/MdePkg/Include/IndustryStandard/Cxl.h
> @@ -12,7 +12,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
> #ifndef _CXL_MAIN_H_ #define _CXL_MAIN_H_
>
> -#include <IndustryStandard/Cxl11.h>
> +#include <IndustryStandard/Cxl20.h>
> //
> // CXL assigned new Vendor ID
> //
> diff --git a/MdePkg/Include/IndustryStandard/Cxl20.h
> b/MdePkg/Include/IndustryStandard/Cxl20.h
> new file mode 100644
> index 0000000000..a5fe22b4a2
> --- /dev/null
> +++ b/MdePkg/Include/IndustryStandard/Cxl20.h
> @@ -0,0 +1,465 @@
> +/** @file
> + CXL 2.0 Register definitions
> +
> + This file contains the register definitions based on the Compute
> Express Link
> + (CXL) Specification Revision 2.0.
> +
> + Copyright (c) 2023, Ampere Computing LLC. All rights reserved.<BR>
> +
> + SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> +**/
> +#ifndef CXL20_H_
> +#define CXL20_H_
> +
> +#include <IndustryStandard/Cxl11.h>
> +
> +//
> +// CXL DVSEC IDs
> +// Compute Express Link Specification Revision 2.0 - Chapter 8.1.1 //
> +#define CXL_DVSEC_ID_PCIE_DVSEC_FOR_CXL_DEVICE 0x0
> +#define CXL_DVSEC_ID_NON_CXL_FUNCTION_MAP 0x2
> +#define CXL_DVSEC_ID_CXL20_EXTENSIONS_DVSEC_FOR_PORTS 0x3
> +#define CXL_DVSEC_ID_GPF_DVSEC_FOR_CXL_PORTS 0x4
> +#define CXL_DVSEC_ID_GPF_DVSEC_FOR_CXL_DEVICES 0x5
> +#define CXL_DVSEC_ID_PCIE_DVSEC_FOR_FLEX_BUS_PORT 0x7
> +#define CXL_DVSEC_ID_REGISTER_LOCATOR 0x8
> +#define CXL_DVSEC_ID_MLD 0x9
> +#define CXL_DVSEC_ID_PCIE_DVSEC_FOR_TEST_CAPABILITY 0xA
> +
> +//
> +// Register Block ID
> +// Compute Express Link Specification Revision 2.0 - Chapter 8.1.9.1
> +//
> +#define CXL_REGISTER_BLOCK_ID_EMPTY 0x0
> +#define CXL_REGISTER_BLOCK_ID_COMPONENT 0x1
> +#define CXL_REGISTER_BLOCK_ID_BAR_VIRTUALIZATION_ACL 0x2
> +#define CXL_REGISTER_BLOCK_ID_DEVICE 0x3
> +
> +//
> +// CXL component register layout
> +// Compute Express Link Specification Revision 2.0 - Chapter 8.2.4 //
> +//|------------------------------------|
> +//|--------- Range & Type -------------|
> +//|------------------------------------| IO Base - 0KB
> +//| (0KB - 4KB)IO Regs |
> +//|------------------------------------| Cache and Mem Base - 4KB
> +//| {4KB - 8KB)Cache & Mem Regs |
> +//|------------------------------------| Implementation Spec Regs
> +Base -
> 8KB
> +//| (8KB - 56KB)Implement Spec Regs|
> +//|------------------------------------| ARB/Mux Regs Base - 56KB
> +//| (56KB - 57KB)ARBMUX Regs |
> +//|------------------------------------| Reserved Base - 57KB
> +//| (57KB - 63KB)Reserved |
> +//|------------------------------------| End 64KB // // Component
> +Register Block Register Ranges Offset //
> +#define CXL_COMPONENT_REGISTER_RANGE_OFFSET_IO 0x0
> +#define CXL_COMPONENT_REGISTER_RANGE_OFFSET_CACHE_MEM 0x1000
> +#define CXL_COMPONENT_REGISTER_RANGE_OFFSET_ARB_MUX 0xE000
> +
> +
> +//
> +// CXL Cache Memory Capability IDs
> +// Compute Express Link Specification Revision 2.0 - Chapter 8.2.5 //
> +#define CXL_CACHE_MEM_CAPABILITY_ID_CXL 0x1
> +#define CXL_CACHE_MEM_CAPABILITY_ID_RAS 0x2
> +#define CXL_CACHE_MEM_CAPABILITY_ID_SECURITY 0x3
> +#define CXL_CACHE_MEM_CAPABILITY_ID_LINK 0x4
> +#define CXL_CACHE_MEM_CAPABILITY_ID_HDM_DECODER 0x5
> +#define CXL_CACHE_MEM_CAPABILITY_ID_EXTENDED_SECURITY 0x6
> +#define CXL_CACHE_MEM_CAPABILITY_ID_IDE 0x7
> +#define CXL_CACHE_MEM_CAPABILITY_ID_SNOOP_FILTER 0x8
> +#define CXL_CACHE_MEM_CAPABILITY_ID_MASK 0xFFFF
> +
> +//
> +// Generic CXL Device Capability IDs 0x0000 ~ 0x3FFF // Compute
> +Express Link Specification Revision 2.0 - Chapter 8.2.8.2.1 //
> +#define CXL_DEVICE_CAPABILITY_ID_CAPABILITIES_ARRAY_REGISTER 0x0000
> +#define CXL_DEVICE_CAPABILITY_ID_DEVICE_STATUS 0x0001
> +#define CXL_DEVICE_CAPABILITY_ID_PRIMARY_MAILBOX 0x0002
> +#define CXL_DEVICE_CAPABILITY_ID_SECONDARY_MAILBOX 0x0003
> +
> +//
> +// Specific CXL Device Capability IDs 0x4000 ~ 0x7FFF // Compute
> +Express Link Specification Revision 2.0 - Chapter 8.2.8.2.1
> and 8.2.8.5
> +
> +//
> +#define CXL_DEVICE_CAPABILITY_ID_MEMORY_DEVICE_STATUS 0x4000
> +#define CXL_DEVICE_CAPABILITY_ID_MASK 0xFFFF
> +
> +//
> +// Memory Device Status
> +// Compute Express Link Specification Revision 2.0 - Chapter
> +8.2.8.5.1.1 //
> +#define CXL_MEM_DEVICE_MEDIA_STATUS_NOT_READY 0x0
> +#define CXL_MEM_DEVICE_MEDIA_STATUS_READY 0x1
> +#define CXL_MEM_DEVICE_MEDIA_STATUS_ERROR 0x2
> +#define CXL_MEM_DEVICE_MEDIA_STATUS_DISABLED 0x3
> +
> +//
> +// Ensure proper structure formats
> +//
> +#pragma pack(1)
> +
> +//
> +// PCIe DVSEC for CXL Device
> +// Compute Express Link Specification Revision 2.0 - Chapter 8.1.3 //
> +typedef union {
> + struct {
> + UINT16 CacheCapable : 1; // bit 0
> + UINT16 IoCapable : 1; // bit 1
> + UINT16 MemCapable : 1; // bit 2
> + UINT16 MemHwInitMode : 1; // bit 3
> + UINT16 HdmCount : 2; // bit 4..5
> + UINT16 CacheWriteBackAndInvalidateCapable : 1; // bit 6
> + UINT16 CxlResetCapable : 1; // bit 7
> + UINT16 CxlResetTimeout : 3; // bit 8..10
> + UINT16 CxlResetMemClrCapable : 1; // bit 11
> + UINT16 Reserved : 1; // bit 12
> + UINT16 MultipleLogicalDevice : 1; // bit 13
> + UINT16 ViralCapable : 1; // bit 14
> + UINT16 PmInitCompletionReportingCapable : 1; // bit 15
> + } Bits;
> + UINT16 Uint16;
> +} CXL_DVSEC_CXL_DEVICE_CAPABILITY;
> +
> +typedef union {
> + struct {
> + UINT16 CacheEnable : 1; // bit 0
> + UINT16 IoEnable : 1; // bit 1
> + UINT16 MemEnable : 1; // bit 2
> + UINT16 CacheSfCoverage : 5; // bit 3..7
> + UINT16 CacheSfGranularity : 3; // bit 8..10
> + UINT16 CacheCleanEviction : 1; // bit 11
> + UINT16 Reserved1 : 2; // bit 12..13
> + UINT16 ViralEnable : 1; // bit 14
> + UINT16 Reserved2 : 1; // bit 15
> + } Bits;
> + UINT16 Uint16;
> +} CXL_DVSEC_CXL_DEVICE_CONTROL;
> +
> +typedef union {
> + struct {
> + UINT16 Reserved1 : 14; // bit 0..13
> + UINT16 ViralStatus : 1; // bit 14
> + UINT16 Reserved2 : 1; // bit 15
> + } Bits;
> + UINT16 Uint16;
> +} CXL_DVSEC_CXL_DEVICE_STATUS;
> +
> +typedef union {
> + struct {
> + UINT16 DisableCaching : 1; // bit 0
> + UINT16 InitiateCacheWriteBackAndInvalidate : 1; // bit 1
> + UINT16 InitiateCxlReset : 1; // bit 2
> + UINT16 CxlResetMemClrEnable : 1; // bit 3
> + UINT16 Reserved : 12; // bit 4..15
> + } Bits;
> + UINT16 Uint16;
> +} CXL_DVSEC_CXL_DEVICE_CONTROL2;
> +
> +typedef union {
> + struct {
> + UINT16 CacheInvalid : 1; // bit 0
> + UINT16 CxlResetComplete : 1; // bit 1
> + UINT16 Reserved : 13; // bit
> 2..14
> + UINT16 PowerManagementInitialzationComplete : 1; // bit
> 15
> + } Bits;
> + UINT16 Uint16;
> +} CXL_DVSEC_CXL_DEVICE_STATUS2;
> +
> +typedef union {
> + struct {
> + UINT16 ConfigLock : 1; // bit 0
> + UINT16 Reserved : 15; // bit 1..15
> + } Bits;
> + UINT16 Uint16;
> +} CXL_DVSEC_CXL_DEVICE_LOCK;
> +
> +typedef union {
> + struct {
> + UINT16 CacheSizeUnit : 4; // bit 0..3
> + UINT16 Reserved : 4; // bit 4..7
> + UINT16 CacheSize : 8; // bit 8..15
> + } Bits;
> + UINT16 Uint16;
> +} CXL_DVSEC_CXL_DEVICE_CAPABILITY2;
> +
> +typedef union {
> + struct {
> + UINT32 MemorySizeHigh : 32; // bit 0..31
> + } Bits;
> + UINT32 Uint32;
> +} CXL_DVSEC_CXL_DEVICE_RANGE_SIZE_HIGH;
> +
> +typedef union {
> + struct {
> + UINT32 MemoryInfoValid : 1; // bit 0
> + UINT32 MemoryActive : 1; // bit 1
> + UINT32 MediaType : 3; // bit 2..4
> + UINT32 MemoryClass : 3; // bit 5..7
> + UINT32 DesiredInterleave : 5; // bit 8..12
> + UINT32 MemoryActiveTimeout : 3; // bit 13..15
> + UINT32 Reserved : 12; // bit 16..27
> + UINT32 MemorySizeLow : 4; // bit 28..31
> + } Bits;
> + UINT32 Uint32;
> +} CXL_DVSEC_CXL_DEVICE_RANGE_SIZE_LOW;
> +
> +typedef union {
> + struct {
> + UINT32 MemoryBaseHigh : 32; // bit 0..31
> + } Bits;
> + UINT32 Uint32;
> +} CXL_DVSEC_CXL_DEVICE_RANGE_BASE_HIGH;
> +
> +typedef union {
> + struct {
> + UINT32 Reserved : 28; // bit 0..27
> + UINT32 MemoryBaseLow : 4; // bit 28..31
> + } Bits;
> + UINT32 Uint32;
> +} CXL_DVSEC_CXL_DEVICE_RANGE_BASE_LOW;
> +
> +
> +typedef struct {
> + PCI_EXPRESS_EXTENDED_CAPABILITIES_HEADER Header;
> // offset 0x00
> + PCI_EXPRESS_DESIGNATED_VENDOR_SPECIFIC_HEADER_1 DvsecHeader1;
> // offset 0x04
> + PCI_EXPRESS_DESIGNATED_VENDOR_SPECIFIC_HEADER_2 DvsecHeader2;
> // offset 0x08
> + CXL_DVSEC_CXL_DEVICE_CAPABILITY DeviceCapability;
> // offset 0x0A
> + CXL_DVSEC_CXL_DEVICE_CONTROL DeviceControl;
> // offset 0x0C
> + CXL_DVSEC_CXL_DEVICE_STATUS DeviceStatus;
> // offset 0x0E
> + CXL_DVSEC_CXL_DEVICE_CONTROL2 DeviceControl2;
> // offset 0x10
> + CXL_DVSEC_CXL_DEVICE_STATUS2 DeviceStatus2;
> // offset 0x12
> + CXL_DVSEC_CXL_DEVICE_LOCK DeviceLock;
> // offset 0x14
> + CXL_DVSEC_CXL_DEVICE_CAPABILITY2 DeviceCapability2;
> // offset 0x16
> + CXL_DVSEC_CXL_DEVICE_RANGE_SIZE_HIGH
> DeviceRange1SizeHigh; // offset 0x18
> + CXL_DVSEC_CXL_DEVICE_RANGE_SIZE_LOW
> DeviceRange1SizeLow; // offset 0x1C
> + CXL_DVSEC_CXL_DEVICE_RANGE_BASE_HIGH
> DeviceRange1BaseHigh; // offset 0x20
> + CXL_DVSEC_CXL_DEVICE_RANGE_BASE_LOW
> DeviceRange1BaseLow; // offset 0x24
> + CXL_DVSEC_CXL_DEVICE_RANGE_SIZE_HIGH
> DeviceRange2SizeHigh; // offset 0x28
> + CXL_DVSEC_CXL_DEVICE_RANGE_SIZE_LOW
> DeviceRange2SizeLow; // offset 0x2C
> + CXL_DVSEC_CXL_DEVICE_RANGE_BASE_HIGH
> DeviceRange2BaseHigh; // offset 0x30
> + CXL_DVSEC_CXL_DEVICE_RANGE_BASE_LOW
> DeviceRange2BaseLow; // offset 0x34
> +} CXL_DVSEC_CXL_DEVICE;
> +
> +#define CXL_DVSEC_CXL_DEVICE_REVISION_1 0x1
> +
> +//
> +// Register Locator DVSEC
> +// Compute Express Link Specification Revision 2.0 - Chapter 8.1.9 //
> +
> +typedef union {
> + struct {
> + UINT32 RegisterBir : 3; // bit 0..2
> + UINT32 Reserved : 5; // bit 3..7
> + UINT32 RegisterBlockIdentifier : 8; // bit 8..15
> + UINT32 RegisterBlockOffsetLow : 16; // bit 16..31
> + } Bits;
> + UINT32 Uint32;
> +} CXL_DVSEC_REGISTER_LOCATOR_REGISTER_OFFSET_LOW;
> +
> +typedef union {
> + struct {
> + UINT32 RegisterBlockOffsetHigh : 32; // bit 0..31
> + } Bits;
> + UINT32 Uint32;
> +} CXL_DVSEC_REGISTER_LOCATOR_REGISTER_OFFSET_HIGH;
> +
> +typedef struct {
> + CXL_DVSEC_REGISTER_LOCATOR_REGISTER_OFFSET_LOW OffsetLow;
> + CXL_DVSEC_REGISTER_LOCATOR_REGISTER_OFFSET_HIGH OffsetHigh;
> +} CXL_DVSEC_REGISTER_LOCATOR_REGISTER_BLOCK;
> +
> +typedef struct {
> + PCI_EXPRESS_EXTENDED_CAPABILITIES_HEADER Header;
> // offset 0x00
> + PCI_EXPRESS_DESIGNATED_VENDOR_SPECIFIC_HEADER_1 DvsecHeader1;
> // offset 0x04
> + PCI_EXPRESS_DESIGNATED_VENDOR_SPECIFIC_HEADER_2 DvsecHeader2;
> // offset 0x08
> + UINT16 Reserved;
> // offset 0x0A
> + CXL_DVSEC_REGISTER_LOCATOR_REGISTER_BLOCK
> RegisterBlock[1]; // offset 0x0C
> +
> +} CXL_DVSEC_REGISTER_LOCATOR;
> +
> +#define CXL_DVSEC_REGISTER_LOCATOR_REVISION_0 0x0
> +
> +//
> +// CXL HDM Decoder Capability Header Register // Compute Express Link
> +Specification Revision 2.0 - Chapter 8.2.5.5 // typedef union {
> + struct {
> + UINT32 CxlCapabilityId : 16; // bit 0..15
> + UINT32 CxlCapabilityVersion : 4; // bit 16..19
> + UINT32 CxlHdmDecoderCapabilityPointer : 12; // bit 20..31
> + } Bits;
> + UINT32 Uint32;
> +} CXL_HDM_DECODER_CAPABILITY_HEADER_REGISTER;
> +
> +//
> +// CXL HDM Decoder Capability Register // Compute Express Link
> +Specification Revision 2.0 - Chapter 8.2.5.12 // typedef union {
> + struct {
> + UINT32 DecoderCount : 4; // bit 0..3
> + UINT32 TargetCount : 4; // bit 4..7
> + UINT32 InterleaveCapableA11to8 : 1; // bit 8
> + UINT32 InterleaveCapableA14to12 : 1; // bit 9
> + UINT32 PoisonOnDecodeErrorCapability : 1; // bit 10
> + UINT32 Reserved : 21; // bit 11..31
> + } Bits;
> + UINT32 Uint32;
> +} CXL_HDM_DECODER_CAPABILITY_REGISTER;
> +
> +typedef union {
> + struct {
> + UINT32 PoisonOnDecodeErrorEnable : 1; // bit 0
> + UINT32 HdmDecoderEnable : 1; // bit 1
> + UINT32 Reserved : 30; // bit 2..31
> + } Bits;
> + UINT32 Uint32;
> +} CXL_HDM_DECODER_GLOBAL_CONTROL_REGISTER;
> +
> +typedef union {
> + struct {
> + UINT32 Reserved : 28; // bit 0..27
> + UINT32 MemoryBaseLow : 4; // bit 28..31
> + } Bits;
> + UINT32 Uint32;
> +} CXL_HDM_DECODER_BASE_LOW_REGISTER;
> +
> +typedef union {
> + struct {
> + UINT32 MemoryBaseHigh : 32; // bit 0..31
> + } Bits;
> + UINT32 Uint32;
> +} CXL_HDM_DECODER_BASE_HIGH_REGISTER;
> +
> +typedef union {
> + struct {
> + UINT32 Reserved : 28; // bit 0..27
> + UINT32 MemorySizeLow : 4; // bit 28..31
> + } Bits;
> + UINT32 Uint32;
> +} CXL_HDM_DECODER_SIZE_LOW_REGISTER;
> +
> +typedef union {
> + struct {
> + UINT32 MemorySizeHigh : 32; // bit 0..31
> + } Bits;
> + UINT32 Uint32;
> +} CXL_HDM_DECODER_SIZE_HIGH_REGISTER;
> +
> +typedef union {
> + struct {
> + UINT32 InterleaveGranularity : 4; // bit 0..3
> + UINT32 InterleaveWays : 4; // bit 4..7
> + UINT32 LockOnCommit : 1; // bit 8
> + UINT32 Commit : 1; // bit 9
> + UINT32 Committed : 1; // bit 10
> + UINT32 ErrorNotCommitted : 1; // bit 11
> + UINT32 TargetDeviceType : 1; // bit 12
> + UINT32 Reserved : 19; // bit 13..31
> + } Bits;
> + UINT32 Uint32;
> +} CXL_HDM_DECODER_CONTROL_REGISTER;
> +
> +typedef union {
> + struct {
> + UINT32 TargetPortIdentiferWay0 : 8; // bit 0..7
> + UINT32 TargetPortIdentiferWay1 : 8; // bit 8..15
> + UINT32 TargetPortIdentiferWay2 : 8; // bit 16..23
> + UINT32 TargetPortIdentiferWay3 : 8; // bit 24..31
> + } Bits;
> + UINT32 Uint32;
> +} CXL_HDM_DECODER_TARGET_LIST_LOW_REGISTER;
> +
> +typedef union {
> + struct {
> + UINT32 Reserved : 28; // bit 0..27
> + UINT32 DpaSkipLow : 4; // bit 28..31
> + } Bits;
> + UINT32 Uint32;
> +} CXL_HDM_DECODER_DPA_SKIP_LOW_REGISTER;
> +
> +typedef union {
> + struct {
> + UINT32 TargetPortIdentiferWay4 : 8; // bit 0..7
> + UINT32 TargetPortIdentiferWay5 : 8; // bit 8..15
> + UINT32 TargetPortIdentiferWay6 : 8; // bit 16..23
> + UINT32 TargetPortIdentiferWay7 : 8; // bit 24..31
> + } Bits;
> + UINT32 Uint32;
> +} CXL_HDM_DECODER_TARGET_LIST_HIGH_REGISTER;
> +
> +typedef union {
> + struct {
> + UINT32 DpaSkipHigh : 32; // bit 0..31
> + } Bits;
> + UINT32 Uint32;
> +} CXL_HDM_DECODER_DPA_SKIP_HIGH_REGISTER;
> +
> +typedef union {
> + CXL_HDM_DECODER_TARGET_LIST_LOW_REGISTER TargetListLow;
> + CXL_HDM_DECODER_DPA_SKIP_LOW_REGISTER DpaSkipLow;
> +} CXL_HDM_DECODER_TARGET_LIST_OR_DPA_SKIP_LOW;
> +
> +typedef union {
> + CXL_HDM_DECODER_TARGET_LIST_HIGH_REGISTER TargetListHigh;
> + CXL_HDM_DECODER_DPA_SKIP_HIGH_REGISTER DpaSkipHigh;
> +} CXL_HDM_DECODER_TARGET_LIST_OR_DPA_SKIP_HIGH;
> +
> +typedef struct {
> + CXL_HDM_DECODER_BASE_LOW_REGISTER DecoderBaseLow;
> // 0x10
> + CXL_HDM_DECODER_BASE_HIGH_REGISTER DecoderBaseHigh;
> // 0x14
> + CXL_HDM_DECODER_SIZE_LOW_REGISTER DecoderSizeLow;
> // 0x18
> + CXL_HDM_DECODER_SIZE_HIGH_REGISTER DecoderSizeHigh;
> // 0x1c
> + CXL_HDM_DECODER_CONTROL_REGISTER DecoderControl;
> // 0x20
> + CXL_HDM_DECODER_TARGET_LIST_OR_DPA_SKIP_LOW
> DecoderTargetListDpaSkipLow; // 0x24
> + CXL_HDM_DECODER_TARGET_LIST_OR_DPA_SKIP_HIGH
> DecoderTargetListDpaSkipHigh; // 0x28
> + UINT32 Reserved;
> // 0x2C
> +} CXL_HDM_DECODER;
> +
> +//
> +// CXL Device Capabilities Array Register // Compute Express Link
> +Specification Revision 2.0 - Chapter 8.2.8.1 //
> +
> +typedef union {
> + struct {
> + UINT64 CxlDeviceCapabilityId : 16; // bit 0..15
> + UINT64 CxlDeviceCapabilityVersion : 8; // bit 16..23
> + UINT64 Reserved1 : 8; // bit 24..31
> + UINT64 CxlDeviceCapabilitiesCount : 16; // bit 32..47
> + UINT64 Reserved2 : 16; // bit 48..63
> + } Bits;
> + UINT64 Uint64;
> +} CXL_DEVICE_CAPABILITIES_ARRAY_REGISTER;
> +
> +//
> +// CXL Memory Status Register
> +// Compute Express Link Specification Revision 2.0 - Chapter 8.2.8.5
> +// typedef union {
> + struct {
> + UINT64 DeviceFatal : 1; // bit 0
> + UINT64 FwHalt : 1; // bit 1
> + UINT64 MediaStatus : 2; // bit 2..3
> + UINT64 MailboxInterfacesReady : 1; // bit 4
> + UINT64 ResetNeeded : 3; // bit 5..7
> + UINT64 Reserved : 56; // bit 8..63
> + } Bits;
> + UINT64 Uint64;
> +} CXL_MEMORY_DEVICE_STATUS_REGISTER;
> +
> +#pragma pack()
> +
> +#endif
> --
> 2.34.1
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